Supporting frame particularly for aligned wheels of skates

Abstract: A supporting frame (1), particularly for aligned wheels (3) of skates, which is shaped like a "U" on the wings (2a,2b) of which there is a plurality of first and second holes (4,5) having the same axis. These holes constitute seats for removable pivots (6) for the wheels and are respectively partially closed and temporarily closeable at their opposite ends. A sliding bar (9), slideable in a groove (8), is used for blocking, at least temporarily, the pivots (6). The wheels are associable with the supporting frame without requiring screws and thus containing the assembly and general costs of the skate.

Description: The present invention relates to a supporting frame, particularly for aligned wheels of skates. Currently, known skates with aligned wheels have a frame which is essentially shaped like a "U", between the ground-facing wings of which there is a plurality of holes at which the stem of a screw for supporting the hub of a wheel is placed; locking occurs for example by using an adapted nut to tighten the screw. The solution which entails the use of screws, however, has some drawbacks: first of all a certain amount of time is required by the operator to insert the screw, associate the nut therewith and then tighten it; the operator must therefore have available a screwdriver as well as a wrench to lock the nut; during these steps, the screw may be badly tightened on the nut, consequently stripping it and requiring replacement. Furthermore, excessive or insufficient tightening of the screw can entail the uncoupling of the nut or the mutual approach of the wings of the frame: in the first case, the screw can be lost and the wheel thus detaches; in the second case, good rolling does not occur due to friction of the wings of the frame with the wheel. From US-1.348.767 it is known a threadless rod or bolt locked at one end by a clip. GB-125267 which is used as basis for the preamble of independent claims 1 and 2, teaches a supporting frame, particularly for aligned wheels of skates, having ground facing wings accommodating therebetween a plurality of wheels, said wheels being blocked by corresponding pivots that are engaged through coaxially arranged pairs of holes defined in said wings. A principal aim of the present invention is therefore to solve the drawbacks described above by providing a supporting frame for aligned wheels of skates which allows easy and rapid assembly of said wheels. Another aim of the present invention is to provide a frame in which wheel assembly is always optimum and maintained in such conditions even during use of the skate. Another aim is to obtain a frame which allows the user to replace the wheels in a rapid, simple and anyway accurate manner in case of wear thereof. A further aim is to obtain a frame which does not require particular tools for the user or assembler. Another important aim is to provide a frame which is structurally simple and easy to industrialize and has very modest manufacturing costs allowing its universal diffusion and application even on known skate types. With these aims, and other aims which will become apparent from the following description in view, there is provided, in accordance with the present invention, a U-shaped supporting frame, particularly for aligned wheels of skates as claimed in claims 1 and 2. The characteristics and advantages of the present invention will become apparent from the following detailed description of a preferred embodiment thereof, illustrated by way of non-limitative example in the accompanying drawings, wherein: figure 1 is a lateral perspective view of the frame according to the present invention as defined in claim 2; figure 2 is an exploded view of some components of the frame of figure 1; figure 3 is a sectional view of the frame of the preceding figures, taken along an axis of a wheel; figure 4 is a view, similar to figure 2, of a further embodiment of the frame according to the present invention as defined in claim 1; figure 5 shows, in a sectional view of figure 4, the temporary locking of a pivot. With reference to the above figures, and considering that they are examples of a particular embodiment and are in variable scale and that identical or equivalent parts are identified by individual reference numerals in said figures, the reference numeral 1 generally designates the frame, essentially U-shaped, having wings 2a and 2b directed toward the ground. Said frame 1 allows to rotatably support a plurality of mutually aligned wheels 3 between the wings 2a and 2b. A plurality of coaxially paired first holes 4 and second holes 5 is formed at the wings 2a and 2b; adapted pivots 6 are removably arrangeable at said holes and interact with the hub 7 of the wheels 3. The first holes 4, formed at the wing 2b, are partially closed, in that they partially accommodate an end of the pivot 6 which cannot exit through said first holes due to a reduction in diameter provided at said holes (figure 3). The second holes 5 are instead formed at an adapted groove 8 formed longitudinally with respect to the wing 2a; the length of the pivots 6 is such that one of their ends is arranged in the first holes 4 and in the second holes 5 without protruding at the groove 8. A complementarily shaped bar 9 is slideably associable with said groove, which preferably has a dovetail cross-section; said bar is inserted and subsequently locked within the groove 8, so as to at least temporarily close the second holes 5, thus preventing the escape of the pivots 6. Assembly of the skate is thus as follows: once the assembler has inserted the wheels between the wings of the frame, the pivots 6 are positioned through the second holes 5 and accommodated within the first holes 4. It is subsequently sufficient to insert the bar 9 within the groove 8, temporarily closing the second holes 5 and thus locking, for example by means of an adapted screw, the position of said bar 9. In this manner, the wheels are optimally supported by the pivots 6, said pivots being not able to leave their seats in any manner. For possible replacement it is sufficient to remove the bar 9 and, at the first hole 4, force the exit of the pivot 6 by means of a pin or any other pointed object. It has thus been observed that the frame has achieved the intended aims, allowing to rapidly and easily assemble the wheels. Assembly is simple, easy, rapid and always optimum, since its precision depends on the dimensions of the pivots and of the first and second holes and not on the operator's skill. Retention of the pivots in their position is ensured by the presence of the bar 9 and by the fact that the first holes 4 have, at one end, a slightly smaller diameter than said pivots 6. Wheel replacement is equally rapid and simple and can be performed even directly by the user, who can in any case restore the optimum conditions during reassembly. Figures 4 and 5 illustrate a solution as defined in claim 1, in which the first holes 104 formed on the wing 102b have, on the outside of said wing, an annular seat 110 at which the head 111 of the pivot 106 is arranged. The reference number 105 defines the second holes formed in the wing opposite to the wing 102b. At its other end, the pivot 106 has an annular groove 112 protruding at the groove 108 so that it can selectively engage a complementarily shaped seat formed on the bar 109 (figure 5). This situation, too, provides optimum locking of the pivot without requiring particular tools and achieves in any case the correct placement of the pivot, which can be achieved again every time the wheels are changed or subjected to maintenance. The materials and the dimensions of the individual components of the frame may vary according to many requirements. Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the scope of each element identified by way of example by such reference signs.

Claims: Supporting frame, particularly for aligned wheels (3) of skates, having ground faced wings on which there is a plurality of first and second holes (104, 105), the first and second holes of each pair having the same axis and constituting seats to accommodate a plurality of pivots adapted to interact with the hub (7) of said wheels (3), characterized in that said first holes (104) have, on the outside of a first of said wings (102b), an annular seat (110), each one of said pivots (106) having at one end a protruding head (111) and at the opposite end an annular recess (112), said head (111) engaging said annular seat (110) and said annular recess (112) being engaged by a bar (109), a groove (108) being longitudinally defined on the outside of a second one of said ground faced wings, said second holes (105) being defined into said groove (108), said bar (109) being adapted to slide within said groove (108) and being complementary shaped with respect to said annular recess (112) of each pivot (106) to engage and block said pivots during its sliding movement. Supporting frame, particularly for aligned wheels (3) of skates, having ground faced wings on which there is a plurality of first and second holes (4, 5), the first and second holes of each pair having the same axis and constituting seats to accommodate a plurality of pivots adapted to interact with the hub (7) of said wheels (3), characterized in that said first holes (4) are partially closed in that they partially accommodate an end of said pivot which cannot exit therethrough due to a reduction in diameter of said holes, said second holes (5) being formed at an adapted groove (8) formed longitudinally on one (2a) of said wings (2a, 2b) opposite to the wing (2b) provided said first holes (4), the length of said pivots being such that one of their ends ia arranged within said first holes and within said second holes without protruding at said groove (8), a complementary shaped bar (9) being slideably associable within said groove, having a dovetail cross-section, said bar being inserted and subsequently locked within said groove so as to temporarily close said second holes, preventing the escape of said pivots.

Inventors: CONTE GINO, CONTE, GINO
Applicants: ROCES SRL, ROCES S.R.L.
Application year: 1994
Main classification: A63C17
IPC codes: A63C17